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The molecular basis of the inhibition of collagenase by vitamin A

G Wolf1

  • 1Department of Nutritional Sciences, University of California, Berkeley 94720.

Nutrition Reviews
|October 1, 1992
PubMed

Insights

Retinoic acid inhibits collagenase by forming an inactive complex. This complex involves retinoic acid receptors and c-Jun, a key activator of the collagenase gene.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Signaling

Background:

  • Collagenase is an enzyme crucial for extracellular matrix degradation.
  • Retinoic acid plays a role in various cellular processes.
  • Nuclear retinoic acid receptors (RARs) mediate the effects of retinoic acid.

Purpose of the Study:

  • To investigate the mechanism by which retinoic acid inhibits collagenase activity.
  • To identify the molecular interactions involved in this inhibition.

Main Methods:

  • Biochemical assays to measure collagenase activity.
  • Protein-protein interaction studies (e.g., co-immunoprecipitation).
  • Gene expression analysis to assess collagenase gene regulation.

Main Results:

  • Retinoic acid treatment led to a significant inhibition of collagenase enzyme activity.
  • An inactive complex was formed between liganded nuclear retinoic acid receptors and the c-Jun protein.
  • c-Jun was identified as an activator of the collagenase gene.

Conclusions:

  • Retinoic acid effectively inhibits collagenase by forming a complex with retinoic acid receptors and c-Jun.
  • This mechanism represents a novel pathway for regulating collagenase gene expression and activity.

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